Anyone know or care to guess, do you need to know any of the following formulae for GRE Math?

1 (a+b)sq = asq+2ab+bsq

2 (a-b)sq = asq-2ab+bsq

3 (a+b)(a-b)= asq - bsq

4 (a+b)cubed = acubed + 3asqb + 3 absq + bcubed

5 (a-b)cubed = acubed - 3asqb + absq - bcubed

6 acubed + bcubed = (a+b)(asq + ab + bsq)

7 quadratic formula